(D)
D:1) RMS Vol-
tage U (mV)
D:2) Mean
sound pressure
(dB(A))
D:3) STD sound
pressure (dB)
27
66.1
0.8
47
70.9
0.8
84
75.5
0.8
149
79.1
0.8
266
81.7
0.7
472
83.7
0.8
MT15H7*WS6-111
D:4)
The electrical input level for which the sound
pressure level is equal to 82 dB(A):
242.3
mV
(E)
Criterion levels
H = 117 dB(A)
M = 111 dB(A)
L = 97 dB(A)
EN352-6:2002
EN 352-4:2001
+ A1:2005
Frequency (Hz)
(C:1)
125
250
500
1000
2000
4000
8000
SLC
80
Class Clamping Force
Mean attenuation (dB)
(C:2)
19.6
23.2
32.9
36.8
36.6
35.0
37.5
12N
Std deviation (dB)
(C:3)
2.3
2.5
3.2
3.0
3.0
4.0
2.6
32
5
Mass
Mean minus SD (dB)
(C:4)
17.3
20.7
29.7
33.8
33.6
31.0
34.9
372 g
C)
Frequency (Hz)
(C:1)
125
250
500
1000
2000
4000
8000
SLC
80
Class Clamping Force
Mean attenuation (dB)
(C:2)
16.0
19.8
27.5
32.7
36.4
33.3
36.1
29
5
11.6N
Std deviation (dB)
(C:3)
3.8
3.8
4.0
3.0
3.6
4.0
3.8
Mass
Mean minus SD (dB)
(C:4)
12.2
16.0
23.5
29.7
32.8
29.3
32.3
357 g
Frequency (Hz)
(C:1)
125
250
500
1000
2000
4000
8000
SLC
80
Class Clamping Force
Mean attenuation (dB)
(C:2)
16.7
18.2
26.4
32.3
35.6
32.1
34.8
9.9 N
Std deviation (dB)
(C:3)
4.0
4.4
5.2
3.3
4.3
3.5
5.3
27
5
Mass
Mean minus SD (dB)
(C:4)
12.7
13.8
21.2
29.0
31.3
28.6
29.5
396 g
AS/NZS 1270:2002
AS/NZS 1270:2002
AS/NZS 1270:2002
Headband with foam cushion
MT15H7AWS6**
Helmet attachment with foam cushion
MT15H7P3*WS6**
Neckband with foam cushion
MT15H7BWS6**